Synchronization Delay Between Context Menu and Selected Row in WPF ListBox

Question

How can I effectively address the timing inconsistency observed in my WPF ListBox, where the selection update lags behind the display of the context menu? This issue becomes prominent when I quickly perform right-click actions on different rows. Specifically, after initiating a right-click on a row to display the context menu, there's a delay in updating the selected row. Consequently, the displayed context menu corresponds to the previously selected row rather than the row currently under the cursor. What strategies can I employ to ensure immediate synchronization between the displayed context menu and the newly selected row, even in scenarios involving rapid right-click actions on various rows? Here the relevant part of my code:

<UserControl.Resources>
    <ContextMenu x:Key="RowMenu" DataContext="{Binding PlacementTarget, RelativeSource={RelativeSource Self}}">
        <MenuItem>
        ..
        </MenuItem>           
    </ContextMenu>
</UserControl.Resources>

<ListBox ItemsSource="{Binding MyItemsSource}">
    <ListBox.SelectedItem>
        <Binding Path="MyViewModel.SelectedViewModel" Mode="TwoWay" />
    </ListBox.SelectedItem>
    <ListBox.ItemContainerStyle>
        <Setter Property="ContextMenu" Value="{StaticResource RowMenu}" />
    </Style>
    </ListBox.ItemContainerStyle>
    <ListBox.Resources>
        <DataTemplate DataType="{x:Type viewModels:MyViewModel}">
            <Grid>
               <!-- code -->
            </Grid>
        </DataTemplate>
    </ListBox.Resources>
</ListBox>